#include <iostream>
#include <mysql/mysql.h>
#include <unistd.h>

// const std::string host = "127.0.0.1";
const std::string host = "localhost";
const std::string user = "connector";
const std::string passwd = "GHSghs123...";
const std::string db = "conn"; 
const unsigned int port = 3306;

int main()
{
    // std::cout << "mysql client version: " << mysql_get_client_info() << std::endl;
    MYSQL* my = mysql_init(nullptr);
    if(my == nullptr)
    {
        std::cerr << "init MySQL error" << std::endl;
        return 1;
    }

    if(mysql_real_connect(my, host.c_str(), user.c_str(), passwd.c_str(), db.c_str(), port, nullptr, 0) == nullptr)
    {
        std::cerr << "connect MySQL error" << std::endl;
        return 2;
    }
    // std::string sql = "update user set name='Kimmy' where id = 1";
    // std::string sql = "insert into user (name,age,telphone) values ('张三', 20, '4684489468')";
    // std::string sql = "delete from user where id=1";
    std::string sql = "select * from user";
    // std::string sql = "select * from user where id=3";
    int n = mysql_query(my, sql.c_str());
    if(n == 0)  std::cout << sql << " success " << std::endl;
    else 
    {
        std::cout << sql << " failed " << std::endl;
        return 3;
    }
    MYSQL_RES *res = mysql_store_result(my);
    if(res == nullptr)
    {
        std::cerr << "mysql_store_result error" << std::endl;  
        return 4;
    }
    int rows = mysql_num_rows(res);
    int fields = mysql_num_fields(res);
    std::cout << "行: " << rows << std::endl;
    std::cout << "列: " << fields << std::endl;
    //属性
    MYSQL_FIELD *fields_array = mysql_fetch_fields(res);
    for(int i = 0; i < fields; i++)
    {
        std::cout << fields_array[i].name << "\t";
    }  
    std::cout << std::endl;

    // 内容
    for(int i = 0; i < rows; i++)
    {
        MYSQL_ROW row = mysql_fetch_row(res);
        for(int j = 0; j < fields; j++)
        {
            std::cout << row[j] << "\t";
        }
        std::cout << std::endl;
    }

    // std::string sql;
    // while(true)
    // {
    //     std::cout << "MySQL>>> ";
    //     if(!std::getline(std::cin, sql) || sql == "quit") 
    //     {
    //         std::cout << "bye bye" << std::endl; 
    //         break;
    //     }
    //     int n = mysql_query(my, sql.c_str());
    //     if(n == 0)
    //     {
    //         std::cout << sql << " success: " << n << std::endl;
    //     }
    //     else
    //     {
    //         std::cerr << sql << " failed: " << n << std::endl;
    //     }
    // }
    //std::cout << "connect success" << std::endl;
    mysql_free_result(res);
    mysql_close(my);
    return 0;
}